{
       "results" : [
          {
             "address_components" : [
                {
                   "long_name" : "1200",
                   "short_name" : "1200",
                   "types" : [ "street_number" ]
                },
                {
                   "long_name" : "2402",
                   "short_name" : "2402",
                   "types" : [ "postal_code_suffix" ]
                }
             ],
             "formatted_address" : "abc, City, State 123, country",
             "geometry" : {
                "bounds" : {
                   "northeast" : {
                      "lat" : 41.8683573,
                      "lng" : -87.6126831
                   },
                   "southwest" : {
                      "lat" : 41.86688609999999,
                      "lng" : -87.6146402
                   }
                },
                "location" : {
                   "lat" : 41.8676217,
                   "lng" : -87.6136616
                },

             },
             "place_id" : "ChIJny65eGMrDogRJ-qe3QJEuEo",
             "types" : [ "premise" ]
          }
       ],
       "status" : "OK"
    }

JSONParser parser = JSON.createParser(res.getBody());
double l1 = null;
double l2 = null;

            while (parser.nextToken() != null) {
                System.debug('entred while');
                if ((parser.getCurrentToken() == JSONToken.FIELD_NAME) &&
                    (parser.getText() == 'location')){

                       parser.nextToken();
                       while (parser.nextToken() != JSONToken.END_OBJECT){
                           String txt = parser.getText();
                           parser.nextToken();
                           if (txt == 'lat')
                               l1 = parser.getDoubleValue();
                           else if (txt == 'lng')
                               l2 = parser.getDoubleValue();
                       }

                }
            }
            // i am storing values in Custom object
             if (l1 != null){
                customobj__c.Location__Latitude__s = l1;
                customobj__c.Location__Longitude__s = l2;
                update customobj__c;
            }